Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
(OP)
Seriously, I hope I'm in a wrong thread, and I really need a quick answers here, hopefully you guys can help me on here. So what are the advantages & disadvantages if we pouring the concrete beam-slabs monolithic with concrete colomn? Like we pour the concrete beam-slab right after we done poured the concrete colomn?






RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong.
-R. Buckminster Fuller
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
BA
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
As one who has designed a substantial amount of shoring/falsework/formwork, I feel compelled to comment on this.
BAretired hits on one disadvantage, the column concrete will shrink. If the shoring supporting the beam/slab is stiff enough, there will be some concern regarding cracking. ACI does address this issue and recommends a delay in the placement of the slab/beam concrete after completing the column concrete placement.
My main concern is lateral stability of the entire formwork & falsework system. The entire system must be designed for the potential and required lateral loads (2% of the dead load or 100 lb/lineal ft). When the columns are placed a couple days before the slab/beam is placed, one gains some stiffness to resist lateral loads (by edge bearing of the deck plywood against the sides of the columns).
This is a common situation in NYC mid-rise projects. The column & wall concrete is often placed after the deck formwork has been installed. Generally there is a delay in the deck concrete placement.
I do know that because of the column concrete shrinkage, the forms used for the columns can become 'locked' into place. This can result in having to destroy (or damage) the forms in order to remove them.
Ralph
Structures Consulting
Northeast USA
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
RE: Advantages & Disadvantages of Pouring Concrete Beam-Slabs Monolithic with Concrete Column
It is always a mistake, and principally poor pour practice, pal.